Timestamp Issue

I just recently moved from AIO SEO to Yoast SEO and now Google shows an incorrect timestamp for my posts. For example, if I were to make a new blog post right now and then check Google 5 minutes later, the post would show up as being published “4 hours ago.” The homepage is also not being updated as regularly as it was with AIOSEO. Btw, I’m using the “Better WordPress Google XML Sitemaps” plugin for my sitemap.